feat: 优化代码

app/src/main/java/io/legado/app/ui/book/read/page/delegate/CoverPageDelegate.kt

@@ -18,14 +18,16 @@ class CoverPageDelegate(pageView: PageView) : HorizontalPageDelegate(pageView) {
     }
 
     override fun onDraw(canvas: Canvas) {
+        if (!isRunning) return
         val offsetX = touchX - startX
 
         if ((mDirection == Direction.NEXT && offsetX > 0)
             || (mDirection == Direction.PREV && offsetX < 0)
-        ) return
+        ) {
+            return
+        }
 
         val distanceX = if (offsetX > 0) offsetX - viewWidth else offsetX + viewWidth
-        if (!isRunning) return
         if (mDirection == Direction.PREV) {
             bitmapMatrix.setTranslate(distanceX, 0.toFloat())
             curBitmap?.let { canvas.drawBitmap(it, 0f, 0f, null) }

app/src/main/java/io/legado/app/ui/book/read/page/delegate/PageDelegate.kt

@@ -128,10 +128,12 @@ abstract class PageDelegate(protected val pageView: PageView) :
 
     private fun stopScroll() {
         isMoved = false
-        isRunning = false
         isStarted = false
+        pageView.post {
+            isRunning = false
             pageView.invalidate()
         }
+    }
 
     open fun setViewSize(width: Int, height: Int) {
         viewWidth = width